1 /* 2 * Copyright (c) 2020, Arm Limited. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <common/debug.h> 8 #include <common/fdt_wrappers.h> 9 10 #include <libfdt.h> 11 #include <fconf_nt_config_getter.h> 12 13 #include <plat/common/platform.h> 14 15 struct event_log_config_t event_log_config; 16 17 int fconf_populate_event_log_config(uintptr_t config) 18 { 19 int err; 20 int node; 21 22 /* Necessary to work with libfdt APIs */ 23 const void *dtb = (const void *)config; 24 25 /* 26 * Find the offset of the node containing "arm,tpm_event_log" 27 * compatible property 28 */ 29 const char *compatible_str = "arm,tpm_event_log"; 30 31 node = fdt_node_offset_by_compatible(dtb, -1, compatible_str); 32 if (node < 0) { 33 ERROR("FCONF: Can't find '%s' compatible in dtb\n", 34 compatible_str); 35 return node; 36 } 37 38 /* Retrieve Event Log details from the DTB */ 39 #ifdef SPD_opteed 40 err = fdtw_read_cells(dtb, node, "tpm_event_log_sm_addr", 2, 41 &event_log_config.tpm_event_log_sm_addr); 42 if (err < 0) { 43 ERROR("FCONF: Read cell failed for 'tpm_event_log_sm_addr'\n"); 44 return err; 45 } 46 #endif 47 err = fdtw_read_cells(dtb, node, 48 "tpm_event_log_addr", 2, &event_log_config.tpm_event_log_addr); 49 if (err < 0) { 50 ERROR("FCONF: Read cell failed for 'tpm_event_log_addr'\n"); 51 return err; 52 } 53 54 err = fdtw_read_cells(dtb, node, 55 "tpm_event_log_size", 1, &event_log_config.tpm_event_log_size); 56 if (err < 0) { 57 ERROR("FCONF: Read cell failed for 'tpm_event_log_size'\n"); 58 } 59 60 return err; 61 } 62 63 FCONF_REGISTER_POPULATOR(NT_CONFIG, event_log_config, 64 fconf_populate_event_log_config); 65